While we think cross-platform play would be awesome, there are currently no plans to allow connectivity between PlayStation Network and Battle.net (this is pretty standard for most games that have PC and console support). As a result, the characters on your Battle.net account and PlayStation account will also remain separate.

In terms of allowing an analog controller hookup for the PC, we donít have any plans for that kind of support right now. Similarly, since Diablo III for console was designed with a controller in mind, the PlayStation version of Diablo III will not support USB mice or keyboards.

There is no cross play for the same reason that there is no cross-play with most competitive games (especially those where you're spending real cash: It is impossible for a console player to remain competitive with a PC player. I can program my keyboard with complex inputs that would twist someone's thumbs into a pretzel if they tried it on a controller.

A keyboard/mouse can provide more input more quickly and precisely than a controller.